

Most users of word & powerpoint are fairly basic users, but if you’re using excel for work then there’s a surprisingly high likelyhood you’re using a sheet written by a wizard with arcane skills in it with the number of VB macros, pivot tables, and things most people don’t even know exist.
Even if you’re just a user and not creating them, and their functionality would better work in a dedicated program or a database, chances are it’d still break unless you’re very lucky.
Yeah, it’s a classic of locking you in and hiking up the prices, and the people capable of porting those sheets are probably way too overworked dealing with supporting the vast majority who have no idea how they work to spend time on it (or getting fired by Elon for not doing anything while being the single block that supports the tower)
It sucks, but I wouldn’t give up on trying to get them to convert, just be aware that it’s very possible that this will be one of the biggest technical (as opposed to administrative) blocks.